#include "rclcpp/rclcpp.hpp"
#include <chrono>
#include <thread>


using namespace std::chrono_literals;

class Node1: public rclcpp::Node
{
public:
    Node1();
    
private:
    void callbacktimer1_();
    void callbacktimer2_();
    void callbacktimer3_();
    
    rclcpp::TimerBase::SharedPtr timer1_;
    rclcpp::TimerBase::SharedPtr timer2_;
    rclcpp::TimerBase::SharedPtr timer3_;
};

